| Literature DB >> 27870965 |
Junyong He1, Kai Chen1, Xingguo Cai1, Yulian Li1, Chengming Wang2, Kaisheng Zhang1, Zhen Jin3, Fanli Meng3, Xuguang Wang4, Lingtao Kong5, Jinhuai Liu6.
Abstract
A biocompatible and novelly-defined adsorption membrane for rapid removal of fluoride was prepared. Both adsorption and membrane techniques were used in this research. Al(OH)3 nanoparticles modified hydroxyapatite (Al-HAP) nanowires were developed and made into Al-HAP membrane. The adsorption data of Al-HAP adsorbent could be well described by Freundlich isotherm model while the adsorption kinetic followed pseudo-second-order model. The maximum of adsorption capacity was 93.84mg/g when the fluoride concentration was 200mg/L. The adsorption mechanism was anion exchanges and electrostatic interactions. The contribution rates of HAP nanowires and Al(OH)3 nanoparticles in fluoride removal were 36.70% and 63.30%, respectively. The fixed-bed column test demonstrate that the Al-HAP was biocompatible and in a good stability during the process of water treatment. The fluoride removal abilities of Al-HAP membrane with 0.3mm thickness could reach 1568L/m2 when fluoride concentrations were 5mg/L. This study indicated that the Al-HAP membrane could be developed into a very viable technology for highly effective removal of fluoride from drinking water.Entities:
Keywords: Adsorption; Al-HAP nanowires; Fluoride; Membrane; Modified
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Year: 2016 PMID： 27870965 DOI： 10.1016/j.jcis.2016.11.009
Source DB: PubMed Journal: J Colloid Interface Sci ISSN： 0021-9797 Impact factor: 8.128